Groundwater Quality in Pumping Wells Located Near Surface Water Bodies

摘要

Well-water quality depends on the relative amounts of water drawn from differenthydrologic units (aquifers, streams, etc.), and the particular capture zones within those units. A contaminant spilled within an aquifer capture zone will eventually enter the well. A spill outside the capture zone may eventually discharge elsewhere, perhaps to a nearby stream. If under normal circumstances the stream is gaining, pumping can locally reverse gradients, causing it to become losing. Stream water can then enter the well by induced infiltration. For